Add fishing particle highlighter

Currently does not work when sneaking or when the bobber moves too much, since the position desyncs with the server

3 files changed, 120 insertions, 1 deletions

diff --git a/src/main/kotlin/moe/nea/notenoughupdates/features/FeatureManager.kt b/src/main/kotlin/moe/nea/notenoughupdates/features/FeatureManager.kt
index bc9a916..2512992 100644
--- a/src/main/kotlin/moe/nea/notenoughupdates/features/FeatureManager.kt
+++ b/src/main/kotlin/moe/nea/notenoughupdates/features/FeatureManager.kt
@@ -3,6 +3,7 @@ package moe.nea.notenoughupdates.features
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.serializer
 import moe.nea.notenoughupdates.NotEnoughUpdates
+import moe.nea.notenoughupdates.features.fishing.FishingWarning
 import moe.nea.notenoughupdates.features.world.FairySouls
 import moe.nea.notenoughupdates.util.data.DataHolder
 
@@ -24,6 +25,7 @@ object FeatureManager : DataHolder<FeatureManager.Config>(serializer(), "feature
         synchronized(this) {
             if (hasAutoloaded) return
             loadFeature(FairySouls)
+            loadFeature(FishingWarning)
             hasAutoloaded = true
         }
     }
diff --git a/src/main/kotlin/moe/nea/notenoughupdates/features/fishing/FishingWarning.kt b/src/main/kotlin/moe/nea/notenoughupdates/features/fishing/FishingWarning.kt
new file mode 100644
index 0000000..c44201c
--- /dev/null
+++ b/src/main/kotlin/moe/nea/notenoughupdates/features/fishing/FishingWarning.kt
@@ -0,0 +1,117 @@
+package moe.nea.notenoughupdates.features.fishing
+
+import kotlin.math.abs
+import kotlin.math.absoluteValue
+import kotlin.math.acos
+import kotlin.math.asin
+import kotlin.math.atan2
+import kotlin.math.sqrt
+import kotlin.time.Duration.Companion.seconds
+import net.minecraft.entity.projectile.FishingBobberEntity
+import net.minecraft.particle.ParticleTypes
+import net.minecraft.util.math.Vec3d
+import moe.nea.notenoughupdates.events.ParticleSpawnEvent
+import moe.nea.notenoughupdates.events.WorldReadyEvent
+import moe.nea.notenoughupdates.events.WorldRenderLastEvent
+import moe.nea.notenoughupdates.features.NEUFeature
+import moe.nea.notenoughupdates.util.MC
+import moe.nea.notenoughupdates.util.TimeMark
+import moe.nea.notenoughupdates.util.config.ManagedConfig
+import moe.nea.notenoughupdates.util.render.RenderBlockContext.Companion.renderBlocks
+
+object FishingWarning : NEUFeature {
+    override val name: String
+        get() = "Fishing Warning"
+    override val identifier: String
+        get() = "fishing-warning"
+
+    object TConfig : ManagedConfig("fishing-warning") {
+        // Display a warning when you are about to hook a fish
+        val displayWarning by toggle("display-warning") { false }
+        val highlightWakeChain by toggle("highlight-wake-chain") { false }
+    }
+
+    override val config: ManagedConfig get() = TConfig
+
+
+    data class WakeChain(
+        val delta: Vec3d,
+        val momentum: Vec3d,
+        val lastContinued: TimeMark,
+    )
+
+
+    val chains = mutableListOf<WakeChain>()
+
+    private fun areAnglesClose(a: Double, b: Double, tolerance: Double): Boolean {
+        var dist = (a - b).absoluteValue
+        if (180 < dist) dist = 360 - dist;
+        return dist <= tolerance
+    }
+
+    private fun calculateAngleFromOffsets(xOffset: Double, zOffset: Double): Double {
+        // See also: Vanilla 1.8.9 Fishing particle code.
+        var angleX = Math.toDegrees(acos(xOffset / 0.04))
+        var angleZ = Math.toDegrees(asin(zOffset / 0.04))
+        if (xOffset < 0) {
+            // Old: angleZ = 180 - angleZ;
+            angleZ = 180 - angleZ
+        }
+        if (zOffset < 0) {
+            angleX = 360 - angleX
+        }
+        angleX %= 360.0
+        angleZ %= 360.0
+        if (angleX < 0) angleX += 360.0
+        if (angleZ < 0) angleZ += 360.0
+        var dist = angleX - angleZ
+        if (dist < -180) dist += 360.0
+        if (dist > 180) dist -= 360.0
+        return angleZ + dist / 2
+    }
+
+    private fun toDegrees(d: Double) = d * 180 / Math.PI
+
+    fun isHookPossible(hook: FishingBobberEntity, particlePos: Vec3d, angle1: Double, angle2: Double): Boolean {
+        val dx = particlePos.x - hook.pos.x
+        val dz = particlePos.z - hook.pos.z
+        val dist = sqrt(dx * dx + dz * dz)
+
+        if (dist < 0.2) return true
+        val tolerance = toDegrees(atan2(0.03125, dist)) * 1.5
+        var angleToHook = toDegrees(atan2(dx, dz)) % 360
+        if (angleToHook < 0) angleToHook += 360
+        return areAnglesClose(angle1, angleToHook, tolerance) || areAnglesClose(angle2, angleToHook, tolerance)
+    }
+
+    val recentParticles = mutableListOf<Pair<Vec3d, TimeMark>>()
+
+    private fun onParticleSpawn(event: ParticleSpawnEvent) {
+        if (event.particleEffect.type != ParticleTypes.FISHING) return
+        if (!(abs(event.offset.y - 0.01f) < 0.001f)) return
+        val hook = MC.player?.fishHook ?: return
+        val actualOffset = event.offset
+        val candidate1 = calculateAngleFromOffsets(actualOffset.x, -actualOffset.z)
+        val candidate2 = calculateAngleFromOffsets(-actualOffset.x, actualOffset.z)
+
+        if (isHookPossible(hook, event.position, candidate1, candidate2)) {
+            recentParticles.add(Pair(event.position, TimeMark.now()))
+        }
+    }
+
+    override fun onLoad() {
+        ParticleSpawnEvent.subscribe(::onParticleSpawn)
+        WorldReadyEvent.subscribe {
+            recentParticles.clear()
+        }
+        WorldRenderLastEvent.subscribe {
+            recentParticles.removeIf { it.second.passedTime() > 5.seconds }
+            renderBlocks(it.matrices, it.camera) {
+                color(0f, 0f, 1f, 1f)
+                recentParticles.forEach {
+                    tinyBlock(it.first, 0.1F)
+                }
+            }
+        }
+    }
+}
diff --git a/src/main/kotlin/moe/nea/notenoughupdates/features/world/FairySouls.kt b/src/main/kotlin/moe/nea/notenoughupdates/features/world/FairySouls.kt
index 2a5219a..ae045c0 100644
--- a/src/main/kotlin/moe/nea/notenoughupdates/features/world/FairySouls.kt
+++ b/src/main/kotlin/moe/nea/notenoughupdates/features/world/FairySouls.kt
@@ -31,7 +31,7 @@ object FairySouls : NEUFeature {
     object DConfig : ProfileSpecificDataHolder<Data>(serializer(), "found-fairysouls", ::Data)
 
 
-    object TConfig : ManagedConfig("fairysouls") {
+    object TConfig : ManagedConfig("fairy-souls") {
 
         val displaySouls by toggle("show") { false }
         val resetSouls by button("reset") {